From: Jeff LaBundy <jeff@labundy.com>
To: lee.jones@linaro.org, dmitry.torokhov@gmail.com,
thierry.reding@gmail.com, jic23@kernel.org,
devicetree@vger.kernel.org
Cc: linux-input@vger.kernel.org, u.kleine-koenig@pengutronix.de,
linux-pwm@vger.kernel.org, knaack.h@gmx.de, lars@metafoo.de,
pmeerw@pmeerw.net, linux-iio@vger.kernel.org, robh+dt@kernel.org,
mark.rutland@arm.com, Jeff LaBundy <jeff@labundy.com>
Subject: [PATCH v5 5/7] iio: temperature: Add support for Azoteq IQS620AT temperature sensor
Date: Sun, 16 Feb 2020 17:32:09 -0600 [thread overview]
Message-ID: <1581895931-6056-6-git-send-email-jeff@labundy.com> (raw)
In-Reply-To: <1581895931-6056-1-git-send-email-jeff@labundy.com>
This patch adds support for the Azoteq IQS620AT temperature sensor,
capable of reporting its absolute die temperature.
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
Changes in v5:
- Replaced iqs62x->map with iqs62x->regmap throughout
- Dropped #defines for platform_driver name and alias in favor of the actual
string names
Changes in v4:
- None
Changes in v3:
- Added Reviewed-by trailer
Changes in v2:
- Moved the driver from hwmon to iio
- Merged 'Copyright' and 'Author' lines into one in introductory comments
- Replaced 'error' with 'ret' throughout
- Eliminated tabbed alignment of platform_driver struct members
- Changed Kconfig "depends on" logic to MFD_IQS62X || COMPILE_TEST
drivers/iio/temperature/Kconfig | 10 ++++
drivers/iio/temperature/Makefile | 1 +
drivers/iio/temperature/iqs620at-temp.c | 97 +++++++++++++++++++++++++++++++++
3 files changed, 108 insertions(+)
create mode 100644 drivers/iio/temperature/iqs620at-temp.c
diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig
index e1ccb40..f1f2a14 100644
--- a/drivers/iio/temperature/Kconfig
+++ b/drivers/iio/temperature/Kconfig
@@ -4,6 +4,16 @@
#
menu "Temperature sensors"
+config IQS620AT_TEMP
+ tristate "Azoteq IQS620AT temperature sensor"
+ depends on MFD_IQS62X || COMPILE_TEST
+ help
+ Say Y here if you want to build support for the Azoteq IQS620AT
+ temperature sensor.
+
+ To compile this driver as a module, choose M here: the module
+ will be called iqs620at-temp.
+
config LTC2983
tristate "Analog Devices Multi-Sensor Digital Temperature Measurement System"
depends on SPI
diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile
index d6b850b..90c1131 100644
--- a/drivers/iio/temperature/Makefile
+++ b/drivers/iio/temperature/Makefile
@@ -3,6 +3,7 @@
# Makefile for industrial I/O temperature drivers
#
+obj-$(CONFIG_IQS620AT_TEMP) += iqs620at-temp.o
obj-$(CONFIG_LTC2983) += ltc2983.o
obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o
obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o
diff --git a/drivers/iio/temperature/iqs620at-temp.c b/drivers/iio/temperature/iqs620at-temp.c
new file mode 100644
index 0000000..3fd52b3
--- /dev/null
+++ b/drivers/iio/temperature/iqs620at-temp.c
@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Azoteq IQS620AT Temperature Sensor
+ *
+ * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com>
+ */
+
+#include <linux/device.h>
+#include <linux/iio/iio.h>
+#include <linux/kernel.h>
+#include <linux/mfd/iqs62x.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define IQS620_TEMP_UI_OUT 0x1A
+
+#define IQS620_TEMP_SCALE 1000
+#define IQS620_TEMP_OFFSET (-100)
+
+static int iqs620_temp_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct iqs62x_core *iqs62x = iio_device_get_drvdata(indio_dev);
+ int ret;
+ __le16 val_buf;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = regmap_raw_read(iqs62x->regmap, IQS620_TEMP_UI_OUT,
+ &val_buf, sizeof(val_buf));
+ if (ret)
+ return ret;
+
+ *val = le16_to_cpu(val_buf);
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SCALE:
+ *val = IQS620_TEMP_SCALE;
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_OFFSET:
+ *val = IQS620_TEMP_OFFSET;
+ return IIO_VAL_INT;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info iqs620_temp_info = {
+ .read_raw = &iqs620_temp_read_raw,
+};
+
+static const struct iio_chan_spec iqs620_temp_channels[] = {
+ {
+ .type = IIO_TEMP,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_OFFSET),
+ },
+};
+
+static int iqs620_temp_probe(struct platform_device *pdev)
+{
+ struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent);
+ struct iio_dev *indio_dev;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev, 0);
+ if (!indio_dev)
+ return -ENOMEM;
+
+ iio_device_set_drvdata(indio_dev, iqs62x);
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->channels = iqs620_temp_channels;
+ indio_dev->num_channels = ARRAY_SIZE(iqs620_temp_channels);
+ indio_dev->name = iqs62x->dev_desc->dev_name;
+ indio_dev->info = &iqs620_temp_info;
+
+ return devm_iio_device_register(&pdev->dev, indio_dev);
+}
+
+static struct platform_driver iqs620_temp_platform_driver = {
+ .driver = {
+ .name = "iqs620at-temp",
+ },
+ .probe = iqs620_temp_probe,
+};
+module_platform_driver(iqs620_temp_platform_driver);
+
+MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>");
+MODULE_DESCRIPTION("Azoteq IQS620AT Temperature Sensor");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:iqs620at-temp");
--
2.7.4
next prev parent reply other threads:[~2020-02-16 23:33 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-16 23:32 [PATCH v5 0/7] Add support for Azoteq IQS620A/621/622/624/625 Jeff LaBundy
2020-02-16 23:32 ` [PATCH v5 1/7] dt-bindings: Add bindings " Jeff LaBundy
2020-02-24 11:14 ` Lee Jones
2020-02-16 23:32 ` [PATCH v5 2/7] mfd: Add support " Jeff LaBundy
2020-02-24 11:14 ` Lee Jones
2020-02-28 3:42 ` Jeff LaBundy
2020-03-02 12:04 ` Lee Jones
2020-03-02 14:11 ` Jeff LaBundy
2020-03-02 14:23 ` Uwe Kleine-König
2020-03-02 14:24 ` Lee Jones
2020-03-23 2:16 ` Jeff LaBundy
2020-03-24 8:16 ` Lee Jones
2020-02-16 23:32 ` [PATCH v5 3/7] input: keyboard: " Jeff LaBundy
2020-02-16 23:32 ` [PATCH v5 4/7] pwm: Add support for Azoteq IQS620A PWM generator Jeff LaBundy
2020-02-28 9:22 ` Uwe Kleine-König
2020-03-09 0:42 ` Jeff LaBundy
2020-02-16 23:32 ` Jeff LaBundy [this message]
2020-02-16 23:32 ` [PATCH v5 6/7] iio: light: Add support for Azoteq IQS621/622 ambient light sensors Jeff LaBundy
2020-02-16 23:32 ` [PATCH v5 7/7] iio: position: Add support for Azoteq IQS624/625 angle sensors Jeff LaBundy
2020-03-27 8:28 ` [GIT PULL] Immutable branch between MFD, IIO and Input due for the v5.7 merge window Lee Jones
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